Improvement in apparatus for oxidizing metals



ZSheets-Sheetl. G. L HARRISON, J'r. & M. 0. WILSON.

APPARATUS FOR OXIDIZING METAL. No,175,701, Patented April 4, 1876.

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APPARATUS FOR OXIDIZING METAL. No.175,701. ?a.tented. April 4, 1876.

FlE 1|| A INVENTEI 5- q l fl/b'd m N.PEFERS, PHOTO-UTMOGRAPMER,WASHINGTON D C UNITED STATES PATENT PENNSYLVANIA.

IMPROVEMENT IN APPARATUS FOR OXIDIZING METALS.

Specification forming part of Letters Patent No. 175,701, dated April 4,1876; application filed November 30, 1875.

To all whom it may concern RISON, Jr., of the city and county ofPhiladelphia, in the State of Pennsylvania, and MORTIMER 0. WILSON, ofthe city of Philadelphia, in the State of Pennsylvania, have invented anew and useful Improvement upon the Apparatus for Oxidizingll/Ietals,for which Letters Patent of the United States were granted to WilliamAtwood, of Cape Elizabeth, Maine, upon the 7th day of March, A. D. 1865,and numbered 46,618, in connection ,with which Letters Patent thefollowing, which we declare to be a full, clear, and precise descriptionof our improvement, is to be understood.

Atwoods invention consists of a revolving chamber for the oxidation ofmetals, so constructed as to admit the passage of a constant current ofatmospheric air over and through the material to be oxidized, while thesame is kept in constant motion and exposed to any desirable degree ofheat.

The object of our improvementis, first, to dispense entirely with theoutside furnace and boiler requisite in connection with a steam-engineto furnish the motive power to actuate the rotating chamber, by so doingrendering the Atwood apparatus self-operating by a single furnace in allits functions; and, second, to render the effective oxidizing capacityof the furnace greater by so 7 consists in a steam-boiler insertedaround the rotary chamber, within the heated-air space inside thebrick-work of the Atwood apparatus, of capacity to generate steamsufficient to operate the engine actuating the rotary chamber, andconstructed with a crown-sheet of the proper curvature to act as areverberating surface above, to radiate the heat back upon the immediatetop surface of the rotary chamber, for the greater oxidizing efficiencyof the same. I

For the better information ofthe public we will proceed to describe indetail the construction of our improvement.

Of the drawings, which illustrate our improvement applied to theordinary Atwood retort, Figure 1 is a longitudinal sectional elevationon the line 0 d of Fig. 2, and Fig. 2 a transverse sectional elevationon the line a. b of Fig. 1.

Similar letters of reference indicate corresponding parts in both thefigures.

.Q represents the brick-work of the retortfurnaee; M, the fire-box; A,the revolving chamber; and N, the heated-air chamber within which Arevolves; P P, fines for the final escape of the exhausted heat; S, theboiler which we insert; It, the dome in which that boiler terminates; T,a connection with the adjoining boiler when more than one retort isused; V V, the piers upon .which the water-legs of the boiler rest; ll,the waterlegs; and m, the crown-plate of the boiler.

In shape our boiler resembles somewhat that of a locomotive. It restsupon piers of brick located upon both sides of the fire-box,and,springing from these piers, arches completely over the revolvingchamber, forming the long sides and the top ofthe heated-air chamber N,as shown in the drawings. The curvature of the crown-plate may bevaried, and the water-legs extended down to the line of the grate-bars,or terminated at any point above them, at pleasure.

The boiler, thus constructed and arranged, utilizes the heat otherwisewasted, for in it is generated steam sufficient to operate an enginecapable of imparting motion to the gearing which revolves the chamber,and by a single fire is effected that which under the present systemrequires two,thus economizing to a very material extent the cost ofrunning the present apparatus.

The shape and construction of our improved furnaees, and the meansofconnecting and disconnecting the hoiicrs one with thewhich acts as areverberating surface to the 7 other, are such as convenience maysuggest. chamber, and a furnace, substantially as and Having thusdescribed our invention, We for the purpose specified.

claim and desire to secure by Letters Patent GEORGE LEIB HARRISON, JR.of the United States MORTIMER 0. WILSON.

In an apparatus for oxidizing metals, the Witnesses; combination of therotary chamber A and. JOHN RODGERS,

arch-shaped boiler S, the crown-sheet of THOMAS S. HARRIscN.

